GM 89018289
Heater Core

One must drain the coolant as the first step of heater core replacement. The Hose Clamp Pliers (J 38185) should be used to set aside clamps of the heater hose inlet and outlet before disconnecting the hookup between the heater core and hoses. The first step involves removing RH and LH instrument panel closeout/insulator panels together with floor carpet and communication interface module. Use Hose Clamp Pliers (J 38185) to transition the floor air outlet duct away from the floor reinforcement holes before cutting it free from the heater core outlet cover. To proceed you should remove the heater core outlet cover screws with heat stakes using a small chisel before taking off the outlet cover from the HVAC module assembly. First prepare the heater core cover by removing screws and heat stakes with a small chisel then take off the cover from the HVAC module assembly. Move the heater core as well as its foam seal outside the HVAC module assembly. The installation process requires addition of a new heater core foam seal to the HVAC module assembly before heater core installation. Install the heater core cover by drilling the dimples around its heat stakes using a 5.5 mm (7/32 in) drill bit and then tighten its screws to 1.5 N.m (13 lb in). Reuse the procedure to install the heater core outlet cover screws by tightening them to 1.5 N.m torque (13 lb in.). The rear air duct should be reattached from the heater core outlet to the floor reinforcement holes where it will be installed. The technician reattaches the communication interface module followed by the floor carpet and insulator panels for both sides of the instrument panel. You should link heater core inlet and outlet hoses and tighten their clamps with Hose Clamp Pliers (J 38185) before performing coolant refill.

The replacement process starts by draining all coolant from the system. The task requires Hose Clamp Pliers (J 38185) to move the heater hose clamps at the heater core position before disconnecting the corresponding heater hoses. Begin the replacement by removing RH and LH instrument panels and then remove floor carpet and communication interface module. Lift the duct of the rear floor air outlet from the floor reinforcement holes and the heater core outlet cover before removing it. Proceed by removing the screws and heat stakes of the outlet cover with a small chisel after which you can disassemble the cover from the HVAC module assembly. End the procedure by removing the heater core along with its foam seal from the HVAC module assembly after taking out the screws and heat stakes with a small chisel. To start the installation process you should position a new heater core foam seal on the HVAC module assembly while also placing the heater core before using a 5.5 mm (7/32 in) drill bit to create dimples near the heat stakes in the heater core cover. Screw in the heater core cover along with its screws until they achieve 1.5 N.m (13 lb in) of torque. Perform installation and tightening procedures twice for both heater core outlet covers as well as their screws at a torque setting of 1.5 N.m (13 lb in). The installation of the heater core outlet cover on rear floor air outlet duct completes by mounting it into the floor reinforcement. The last step is to place back the floor carpet then reinsert the communication interface module before applying the RH instrument panel closeout/insulator panels. Attach the inlet and outlet heater hoses to the heater core and tighten the clamps using Hose Clamp Pliers (J 38185) before refilling the coolant.

Before replacing the heater core users must drain the cooling system and eliminate the fuel injector sight shield. Position aside the heater hose inlet and outlet clamps at the heater core using Hose Clamp Pliers (J 38185) before disconnecting the inlet and outlet heater hoses. Start by removing the RH and LH Instrument Panel Closeout/Insulator panels as well as the floor carpet from their holes in the floor reinforcement while disconnecting the heater air outlet cover and rear floor air outlet duct. Begin by removing screws and heating up the stakes on the heater air outlet cover before taking off the cover from the HVAC module assembly. Remove heater core cover screws along with heater core cover heat stakes, then remove the heater core and heater core foam seal. Begin heater core installation with the positioning of new heater core foam seal onto the HVAC module assembly followed by heater core assembly. Use a 5.5 mm (7/32 in) drill bit to perform dimple drilling next to the heat stakes of the heater core cover. Secure the cover to the HVAC module assembly by using screws which should be tightened to 1.5 N.m (13 lb in). Rehash the heater air outlet cover installation procedure by setting the screws to 1.5 N.m (13 lb in) torque. The rear floor air outlet duct receives the heater air outlet cover before installing it through floor reinforcement holes. The last step includes reinstallation of the floor carpet as well as the RH and LH Instrument Panel Closeout/Insulator panels while using Hose Clamp Pliers (J 38185) to reposition the clamps and connecting the inlet and outlet heater hoses to the heater core. After which you will finish installing the fuel injector sight shield before filling the cooling system.

Before starting the heater core replacement you must drain the cooling system and remove the fuel injector sight shield. The Hose Clamp Pliers tool (J 38185) helps secure the heater hose inlet and outlet clamps before the dissconnection of inlet and outlet heater hoses can proceed. Start the procedure by taking away the RH and LH Instrument Panel Closeout/Insulator panels and floor carpet and rear floor air outlet duct from the floor reinforcement holes while disconnecting the heater air outlet cover during this process. Disassemble the heater air outlet cover by first removing its screws and heat stakes and finish by removing the cover itself. Next remove the screws and heat stakes from the heater core cover before taking out the heater core itself along with the heater core foam seal . The first step for installation involves attaching a new heater core foam seal onto the HVAC module assembly followed by heater core installation. Next drill the dimples next to the heat stakes in the heater core cover using a 5.5 mm (7/32 in) drill bit. The HVAC module assembly requires the heater core cover by using screws which need to be tightened to 1.5 N.m (13 lb in). Install the heater air outlet cover along with its screws then tighten each one to 1.5 N.m (13 lb in). The rear floor air outlet duct requires connection to the heater air outlet cover before installing it through the floor reinforcement holes. Replace all flooring carpeting while installing new RH and LH Instrument Panels together with their closeout and insulator components. The last steps involve heater core hose reattachment and Hose Clamp Pliers (J 38185) for clamp realignment then the installation of the fuel injector sight shield followed by filling the cooling system.

Detach the rear floor air outlet duct from the holes in the floor reinforcement and from the heater core outlet cover, then remove the duct.

Place a new heater core foam seal onto the HVAC module assembly, followed by the heater core.